Pot for use in the manufacture of glass.



R. S. PEASE.

POT FOR USE IN THE MANUFACTURE OF GLASS.

APPLICATION FILED OCT. I9, I912. LWQWfl Patented Apr. 25,1916.

3 SHEETS SHEET I.

WITNESSES:

I NTOR. g

,VWLM/ A TTORNE Y.

R. S. PEASE.

POT FOR USE IN THE MANUFACTURE OF GLASS.

APPLICATION FILED OCT-19,1912- Patented Apr. 25,1916.

3 SHEETSSHEET 2.

3 SHEETSSHEET 3.

Patented Apr. 25, 1916.

R. S. PEASE.

POT FOR USE IN THE MANUFACTURE OF GLASS.

APPLICATION FILED OCT-19, 1912.

1 TOR T ORNE Y WITNESSES:

ail/HA provement "of the quality of my invention,

. that noenn s. rnasn;

PENNSYLVANIA.

0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO THE PITTSBURGH PLATE GLASS COMPANY, OF FITTSIBURGH, PENNSYLVANIA, A

CORPORATION 013 row. non use in THE ivia vuraorunn or en'ass.

income.

Patented Apr. 25, 19166.

Application filed October 19, 1912. Serial No. 726,756.

To all whom it may concern:

Be it known that I, ROGER.S. Pnasn, a citizen of the United States, residing in Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a certain new and ,useful Pot for Use in the Manufacture of Glass, of which the following is a specification.

The invention relates to a pot for use in the manufacture of glass to which the glass will not adhere and from which the glass can bereadily removed or discharged with- .out the application of heat, and it is of especial value in connection with glass drawing operations,

pear. Amongthe pri' vention are; "the prov sion of a which the glass will not adhere, whereby saving in time and fuel consumption is ef-.

fected; and pot of the progress of manufacturewill be greatly expedited and simplified, thereby increasing production and reducing the cost thereof. My invention further contemplates the imthe product. These, together with such other objects as may hereinafter appear or are incidental to I attain by means of a construction various embodiments of which are disclosed in the accompanying drawings wherein- Fi re 1 is a side elevation of an apparatus or drawing-glass cylinders, with my improved form of non-adherent pot shown in section in position therein; Figs. 2 and 3 are a section and plan view of another form of pot, and Figs. 4 and 5 are sectional views of still other forms of pot.

in general the provision of a My invention primarily is designed for use in glass drawing operations, such 101' example as the drawing of glass cylinders for the making of window glass. In drawing glass from a tank, a portion of the molten glass adjacent the point of drawing becomes relatively cooler than the remain ing glass, and the presence of this together with such portions ofzthe cylinder as are out off or break oif when the cylinder is cut and removed, has the following results; first, it incurs a loss-of time necessarily incident to the remelting or reheating of this glass to proper drawing conditions, a loss has been found to greatly increase the as will hereinafter apmary objects of my in-- pot to 4 character described whereby-the cost of production; and second, the texture of such glass appears to change and in subsequent draws the glass is poor and loreak-- age and total losse's'occur, even though the glass has been rem'elted. In drawing frompots the residual parts remaining in the pot must be removed in order to secure eifective results, and this is accomplished by melting out such portions, the fuel consumed and the loss of time incurred tending to increase the costof production. My invention contemplates among other things the complete removal ofthe portions of glass above referredto from the molten glass utilized in succeeding operations, thereby insuring-superior quality in the production; and it further contemplates a simple apparatus whereby the reheating. and remelting operations are eliminated and the process of manufacture greatly expedited, thus ob-. taining a maximum production at a reduced cost. I attain these ends by the provision of a pot to which the said portions of'glass will not adhere and from which said portions may be readily removed without the need of applying heat. In this specification I shall describe its application to a cylinder drawing mechanism, reference being first had to Fig. 1.

As there shown, a drawing bait 7 is supported from a carriage 8 slidably mounted on the guide rails or frame 10. Trunnioned in the lower part of the frame is one'ernbodiment of my improved pot 11 which is filled with molten glass in any preferred manner. The pot comprises a body portion 12, preferably composed of metal, which is hollowed or cupped out and has an upstanding standard 13 projecting from the central'part of the hollowed out portion. A layer 14 of sand or other heat retaining material covers the upper surface of the pot and in turn is protectedby a sheathing 15 preferably composed of a pastelike substance which will maintain the sand in place. Over the paste is a lining member 16 of copper, platinum, German silver, or other material to which glass does not adhere. It will be observed that the sides of the cupped out portion slope outwardly. The lining member 16 is held in position by means of the annular plate 17. Air is supplied for the drawing operation through the passage 1.8 in the core 13, the port 19 which extends through one trunnion and opens into the passage 18, and the pipe 20 which leads to any suitable source of supply. Any portions of glass that may enter the passage 18 can be readily removed by taking out the plug 21. Extending beneath the drawing apparatus is a track 22 upon which is mounted a car 23 which can be moved beneath the pot 11 so that the contents of the latter will be dumped into the car when the pot isinverted as will hereinafter appear.

' product and reduces One trunnion of the pot is provided with a squared end 24 to receive an operating handle. i i

The operation of this device is as follows: The pot is turned to the position indicated in Figure l and is filled with molten glass, after which the bait 7 is immersed in the glass and thereafter elevated, drawing a cylsupplied as previously pointed out The cylinder is centered, that is, mamtamed 1n vertical alinement, as the drawing proceeds, by the standard 13, thereby insuring umformity of product. When the cyllnder 15 completed it is cut off, leaving in the pot such portions of the original charge of glass as are unused, and such portions of the cylinder as may have been cut off or have broken off, all of such portions, as prevlousl pointed out, being unfit for further use until thoroughly reheated and melted to proper drawing consistency. In order to prepare the pot for a fresh charge of glass, the pot is inverted and the residual parts of the previous drawing operation fall out of the pot into the car 23, leaving the surface of the pot clean. This is clearly shown in the lower portion of Fig. 1, though it will be understood that such residual parts may be of different configuration than as shown. The pot is then turned back to operative position and a fresh charge of glass supplied, after which the drawing can again proceed. The advantages of this construction are that it entirely eliminates thetroublesome residual portions of previous drawing operations and thereby secures superiority of loss from breakages resulting from impurities and defective glass to a minimum. At the same time economy of operation is attained,- since it will be readily apparent that the drawing operations can be repeated with great rapidity. This construction also does away with fires for melting out the residual portions of glass, inasmuch as the-glass will fallout of 'the pot by the force of gravity and can be readily loosened, for example, by a tool. The advantges of the particular construc- I tion of pot illustrated are that it retains the heat for a considerable period of time, and

that the lining members can be readily re-' newed.

In Fig. 2 I have shown a section of another form of pot which has the samegeneral structural and functional characteristics as that just described, but is comprised of a body, portion 26 to which is secured a nonadherent lid or plate 27 which is hollowed out to form the glass containing receptacle. As before, air, is supplied to the hollow standard through apipe 20 which extends through the pipe 28 which is mounted in the hollow trunnion 29 in such manner that it is open at its inner end. The pipe 28' is connected to the outer end of the pipe 28 and leads to a source of water or other cooling agent. The advantages of this construction are that the plate 27 can be readily removed and replaced, and that the pot may be cooled and thereby make the, removal of the glass easier. Fig. 3 shows the pot turned through 90. inder 25, the requisite amount of a1r being a In Fig. 4 I have illustrated a pot which is composed of ablock of soapstone 30, the pot having the same general configurationt as thosepreviously described. The glass will not adhere to the soapstone and will readily fall out when the pot is reversed. In this construction, however, the drawing is accomplished by the usual mechanism wherein the air is supplied through the usual form of bait and blowpipe.

In Fig. 5 another modification is illustrated. In this form the pot is comprised of a metal body portion 31, a large quantity of sand packing 32, or other heat retaining material, and a lining member 33 of German silver or similar non-adherent substance the lining member and sand being retained by the plate 34:. The chief advantage incident to this construction is that the heat is retained for a considerable period of time, tending to secure better drawing conditions.

From the foregoing it is thought that the advantages of the device will be clear and broadly considered, my invention consists in the provision of a glass containing receptacle to which the glass does not adhere, and from which the residual portions of glass can be removed or discharged without the need of applying heat.-

Having thus described my invention and illustrated its use, what I claim as new and desire to'secure by Letters Patent, is the following:

1. An invertible pot for use in the manufacture of glass made of material to which the glass will not adhere, and constructed so that the contents will freely fall out when the pot is inverted. I

2. An invertible pot for use in the manufacture of glass made of a material to which the glass will not adhere and from which it will readily fall out when the pot is inverted, without the need of applying heat.

3. A pot for use in the manufacture of glass, comprising a body portion, a heat retaming element, and within the body portion a lining over the said element to which the glass will not adhere.

4:. A pot for use in the manufacture of 10 to which the glass will not adhere and from which it will readily fall out without the application of heat.

In testimony whereof T have hereuntd signed my name in the presence of-the two subscribed witnesses.

ROGER S. PEASE.

Witnesses:

HARVEY 'L. LECHNER, AROHWORTH MARTIN.

@epilea M patent may be attained for five cents each, by addressing the "Gommiseieuer ef Eetentt,

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